A type of genetic abnormality linked to cancer is more common in people with type 2 diabetes than the rest of the population, a new study has found. People with type 2 diabetes are already known to have a higher risk of cancers, especially blood cancers like lymphoma and leukaemia. The new study, led by scientists at Imperial College London and CNRS in France, suggests that mutations called clonal mosaic events (CMEs) may partly explain why this is.